Prosecutors said Rasheed Al Jijakli was sentenced Thursday to 46 months in federal prison after a judge said he delivered "instruments of death" to Syria.
Jijakli pleaded guilty to conspiring to export tactical gear that included dozens of laser-sighting devices and day- and night-vision rifle scopes.
Prosecutors say Jijakli violated the International Emergency Economic Powers Act and sanctions imposed on Syria by the United States.
The Palmyra Corp. CEO admitted directing co-conspirators to withdraw $17,000 from the check cashing business to buy tactical gear for Syrian rebels.
Various rebel groups have fought the government of Syrian President Bashar Assad.